* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}


body {
  font-family: 'Segoe UI', sans-serif;
  background: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
  color: #fff;
  animation: gradientShift 20s infinite alternate;
}


@keyframes gradientShift {
  0% {
    background-position: 0% 50%;
  }
  100% {
    background-position: 100% 50%;
  }
}


.container {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(20px);
  border-radius: 20px;
  padding: 40px;
  width: 90%;
  max-width: 500px;
  box-shadow: 0 0 30px rgba(0, 255, 255, 0.1);
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.15);
  transition: transform 0.3s ease;
}
.container:hover {
  transform: scale(1.01);
}


h1 {
  font-size: 2.5rem;
  margin-bottom: 30px;
  background: linear-gradient(90deg, #00f0ff, #39ff14);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 10px #00ffc8;
}


.controls {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-bottom: 30px;
}

.controls label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: bold;
  font-size: 1rem;
  color: #ccc;
  transition: color 0.3s ease;
}

.controls label:hover {
  color: #00ffc8;
}


input[type="number"] {
  padding: 12px;
  border-radius: 10px;
  border: 2px solid #00ffc8;
  background: rgba(255, 255, 255, 0.1);
  color: #00ffc8;
  font-size: 1rem;
  text-align: center;
  outline: none;
  transition: all 0.3s ease;
}

input[type="number"]:hover,
input[type="number"]:focus {
  border-color: #39ff14;
  background-color: rgba(0, 0, 0, 0.3);
  box-shadow: 0 0 10px #00ffc8;
}


button {
  padding: 14px 20px;
  font-size: 1.1rem;
  font-weight: bold;
  border-radius: 12px;
  border: none;
  cursor: pointer;
  background: linear-gradient(to right, #00f0ff, #39ff14);
  color: #000;
  transition: all 0.3s ease, transform 0.2s ease;
  box-shadow: 0 0 10px #00ffc8;
}

button:hover {
  background: linear-gradient(to right, #39ff14, #00f0ff);
  transform: scale(1.05);
  box-shadow: 0 0 15px #39ff14;
}


.output-area {
  margin-top: 20px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 12px;
  padding: 20px;
  font-size: 1.3rem;
  min-height: 40px;
  word-break: break-word;
  color: #39ff14;
  border: 2px dashed #00ffc8;
  transition: all 0.3s ease;
  box-shadow: inset 0 0 10px rgba(0, 255, 255, 0.3);
}

.output-area:hover {
  border-color: #39ff14;
  box-shadow: inset 0 0 20px rgba(0, 255, 255, 0.5);
  background-color: rgba(0, 0, 0, 0.3);
}


.copy-btn {
  margin-top: 15px;
  background: linear-gradient(to right, #ff00cc, #3333ff);
  color: white;
  box-shadow: 0 0 10px #ff00cc;
}

.copy-btn:hover {
  background: linear-gradient(to right, #3333ff, #ff00cc);
  box-shadow: 0 0 15px #ff00cc;
}


@media (max-width: 500px) {
  h1 {
    font-size: 2rem;
  }

  .controls {
    font-size: 0.9rem;
  }

  button {
    font-size: 1rem;
  }

  input[type="number"] {
    font-size: 0.9rem;
  }

  .output-area {
    font-size: 1.1rem;
  }
}